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Finding the Fourth Proportional to 14,791.39, 20,412.94 and 8,077.64

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Solution

The fourth proportional to 14,791.39, 20,412.94 and 8,077.64 is: 11,147.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,791.39 : 20,412.94 = 8,077.64 : x
  2. Step 2: Convert to fraction form
    14,791.39/20,412.94 = 8,077.64/x
  3. Step 3: Cross multiply
    14,791.39x = 20,412.94 × 8,077.64
  4. Step 4: Simplify right side
    14,791.39x = 164,888,380.66
  5. Step 5: Solve for x
    x = 164,888,380.66/14,791.39
  6. Step 6: Final answer
    x = 11,147.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.